scholarly journals Chromospheric activity on late-type star DM UMa using high-resolution spectroscopic observations

2016 ◽  
Vol 459 (1) ◽  
pp. 854-862 ◽  
Author(s):  
LiYun Zhang ◽  
QingFeng Pi ◽  
Xianming L. Han ◽  
Liang Chang ◽  
Daimei Wang
Keyword(s):  
High Resolution ◽  
Type Star ◽  
Late Type ◽  
Spectroscopic Observations ◽  
Chromospheric Activity ◽  
Late Type Star

Chromospheric activity on late-type star LQ Hya

New Astronomy ◽  
2014 ◽  
Vol 32 ◽  
pp. 1-5 ◽  
Author(s):  
Liyun Zhang ◽  
Qingfeng Pi ◽  
Zhongzhong Zhu ◽  
Xiliang Zhang ◽  
Zhongmu Li
Keyword(s):  
Type Star ◽  
Late Type ◽  
Chromospheric Activity ◽  
Late Type Star

scholarly journals SiO maser emission in oxygen AGB stars

2007 ◽  
Vol 3 (S242) ◽  
pp. 332-333
Author(s):  
R. Soria-Ruiz ◽  
F. Colomer ◽  
J. Alcolea ◽  
V. Bujarrabal ◽  
J.-F. Desmurs
Keyword(s):  
Spatial Distribution ◽  
High Resolution ◽  
Type Star ◽  
Agb Stars ◽  
Late Type ◽  
Maser Emission ◽  
Long Baseline ◽  
Late Type Star ◽  
Very Long Baseline Array

AbstractWe present high resolution observations of SiO masers in the late-type star R Cas as part of a multi-line study of SiO circumstellar masers in oxygen-rich AGB stars. We used the NRAO Very Long Baseline Array (VLBA) to map the 43 GHz maser emission of 28SiO. We study the relative spatial distribution of the different maser lines and discuss the relevance of line overlaps in the SiO pumping theory.

scholarly journals Chromospheric activity on the late-type star V1355 Ori using Lijiang 1.8-m and 2.4-m telescopes

2016 ◽  
Vol 16 (10) ◽  
pp. 153 ◽  
Author(s):  
Qing-Feng Pi ◽  
Li-Yun Zhang ◽  
Liang Chang ◽  
Xian-Ming Han ◽  
Hong-Peng Lu ◽  
...  
Keyword(s):  
Type Star ◽  
Late Type ◽  
Chromospheric Activity ◽  
Late Type Star

scholarly journals Evidence of a Low-Mass Companion to AB Doradus

1998 ◽  
Vol 164 ◽  
pp. 325-326
Author(s):  
J. C. Guirado ◽  
J. E. Reynolds ◽  
J.-F. Lestrade ◽  
R. A. Preston ◽  
D. L. Jauncey ◽  
...  
Keyword(s):  
Satellite Data ◽  
Main Sequence ◽  
Brown Dwarfs ◽  
Type Star ◽  
Late Type ◽  
Hydrogen Burning ◽  
Late Type Star ◽  
Low Mass

AbstractFrom the combination of VLBI phase-referenced observations and Hipparcos satellite data, we have found evidence of a low-mass object orbiting the late-type star AB Doradus. The mass of the new object is near the hydrogen burning limit and will constitute a precise point for calibrating the low end of the main sequence. This represents the first detection of a low-mass stellar companion using the VLBI technique, which could become an important tool in future searches for planets and brown dwarfs orbiting other stars.

scholarly journals A SUPER-JUPITER ORBITING A LATE-TYPE STAR: A REFINED ANALYSIS OF MICROLENSING EVENT OGLE-2012-BLG-0406

2014 ◽  
Vol 782 (1) ◽  
pp. 48 ◽  
Author(s):  
Y. Tsapras ◽  
J.-Y. Choi ◽  
R. A. Street ◽  
C. Han ◽  
V. Bozza ◽  
...  
Keyword(s):  
Type Star ◽  
Late Type ◽  
Late Type Star

scholarly journals Doppler imaging of the young late-type star LO Pegasi (BD+22°4409) in 2003 September

2008 ◽  
Vol 387 (1) ◽  
pp. 237-246 ◽  
Author(s):  
N. Piluso ◽  
A. F. Lanza ◽  
I. Pagano ◽  
A. C. Lanzafame ◽  
J.-F. Donati
Keyword(s):  
Doppler Imaging ◽  
Type Star ◽  
Late Type ◽  
Late Type Star

Model Photospheres for Late‐Type Stars from the Inversion of High‐Resolution Spectroscopic Observations: Groombridge 1830 and ε Eridani

2000 ◽  
Vol 528 (2) ◽  
pp. 885-895 ◽  
Author(s):  
Carlos Allende Prieto ◽  
Ramon J. Garcia Lopez ◽  
David L. Lambert ◽  
Basilio Ruiz Cobo
Keyword(s):  
High Resolution ◽  
Late Type ◽  
Spectroscopic Observations

A Late-Type Star of Very Large Radial Velocity

1956 ◽  
Vol 68 ◽  
pp. 533 ◽  
Author(s):  
George W. Preston ◽  
William P. Bidelman
Keyword(s):  
Radial Velocity ◽  
Type Star ◽  
Late Type ◽  
Late Type Star

scholarly journals MASCARA-3b

2019 ◽  
Vol 631 ◽  
pp. A76 ◽  
Author(s):  
M. Hjorth ◽  
S. Albrecht ◽  
G. J. J. Talens ◽  
F. Grundahl ◽  
A. B. Justesen ◽  
...  
Keyword(s):  
Circular Orbit ◽  
Radial Velocities ◽  
Type Star ◽  
Late Type ◽  
Spectroscopic Measurements ◽  
Type Host ◽  
Late Type Star ◽  
Velocity Anomalies ◽  
The Mean

We report the discovery of MASCARA-3b, a hot Jupiter orbiting its bright (V = 8.33) late F-type host every 5.55149 ± 0.00001 days in an almost circular orbit (e = 0.050−0.017+0.020). This is the fourth exoplanet discovered with the Multi-site All-Sky CAmeRA (MASCARA), and the first of these that orbits a late-type star. Follow-up spectroscopic measurements were obtained in and out of transit with the Hertzsprung SONG telescope. Combining the MASCARA photometry and SONG radial velocities reveals a radius and mass of 1.36 ± 0.05 RJup and 4.2 ± 0.2 MJup. In addition, SONG spectroscopic transit observations were obtained on two separate nights. From analyzing the mean out-of-transit broadening function, we obtain v sin i⋆ = 20.4 ± 0.4 km s−1. In addition, investigating the Rossiter-McLaughlin effect, as observed in the distortion of the stellar lines directly and through velocity anomalies, we find the projected obliquity to be λ = 1.2−7.4+8.2 deg, which is consistent with alignment.

scholarly journals Detection of the Irradiated Red Dwarf in WY Sge (Nova 1783)

1996 ◽  
Vol 158 ◽  
pp. 327-328
Author(s):  
M. W. Somers ◽  
K. Mukai ◽  
T. Naylor ◽  
F.A. Ringwald
Keyword(s):  
Optical Spectroscopy ◽  
White Dwarf ◽  
Type Star ◽  
Sufficient Information ◽  
Late Type ◽  
Dwarf Novae ◽  
System A ◽  
Late Type Star ◽  
The Face ◽  
Ir Photometry

AbstractWe present infrared (IR) photometry and optical spectroscopy of the eclipsing old nova WY Sge. According to hibernation theorists the disc in a system a few centuries after outburst should be significantly fainter than in other, more recent, old novae but similar to the discs of dwarf novae in quiescence. Despite the apparent faintness of the late type star we have sufficient information to infer that the face closest to the white dwarf (WD) is irradiated.

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